JP2019174214A - Navigation system and navigation program - Google Patents

Abstract

To provide technology that increases the possibility of the traveling direction of a vehicle at the latest intersection on a scheduled travel route and lane information concerning the intersection being easily recognized by a driver.SOLUTION: A navigation system 10 includes: a scheduled travel route acquisition unit 21a for acquiring the scheduled travel route of a vehicle; a lane information acquisition unit 21b for acquiring lane information which, with regard to each of a plurality of intersections ahead of the vehicle on the scheduled travel route, indicates an exit direction from the intersection, for each lane of an entry road to the intersection; and a display control unit 21c. The display control unit displays mutually identifiable icons on a plurality of intersections on a map, displays icons on a lane guide in the same mode as the icons on the map in association with each of the plurality of intersections, and when the distance between the vehicle and the latest intersection becomes less than or equal to a prescribed distance, displays the icon of the latest intersection on the map preferentially over the scheduled travel route and displays the scheduled travel route preferentially over the icons of intersections other than the latest intersection.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a navigation system and a navigation program.

  Conventionally, in a vehicle navigation system, it is known to display a lane guide indicating lane information at each of a plurality of intersections ahead of the vehicle together with a map around the vehicle. In Patent Document 1, a plurality of intersection icons on a planned travel route on a map are displayed in a different manner from each other, and an intersection icon in an intersection guide (corresponding to a lane guide) displayed adjacent to the map is a corresponding intersection on the map. The display in the same manner is described.

JP 2003-329468 A

By the way, a technique is known in which a traveling direction at an intersection ahead of a vehicle on a planned travel route is guided by an arrow superimposed and displayed on an image showing a road. However, when the arrow is configured to be displayed with priority over the intersection icon, the intersection icon is hidden behind the arrow and cannot be seen, and it is difficult to determine the correspondence between the intersection indicated in the lane guide and the intersection on the map. There was a problem.
The present invention has been made in view of the above problems, and is a technique for increasing the possibility that the driver can easily recognize the traveling direction of the vehicle at the nearest intersection on the planned travel route and the lane information of the intersection. For the purpose of provision.

  In order to achieve the above object, the navigation system obtains a planned travel route acquisition unit that acquires a planned travel route of the vehicle, and a plurality of intersections ahead of the vehicle on the planned travel route, the exit direction from the intersection to the intersection. A display control unit that displays on a display a lane information acquisition unit that acquires lane information shown for each lane of an approach road, a map that includes a planned travel route, and a lane guide that shows lane information about the plurality of intersections A display control unit that displays icons that can be distinguished from each other on a plurality of intersections in the map, and displays icons in the same manner as the icons on the map in association with each of the plurality of intersections in the lane guide; Prepare. When the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, the display control unit displays the icon corresponding to the nearest intersection on the map with priority over the planned travel route, and the intersection other than the nearest intersection. The scheduled travel route is displayed with priority over the icon corresponding to.

  Further, in order to achieve the above object, the navigation program causes the computer to exit the intersection for each of a plurality of intersections ahead of the vehicle on the planned traveling route, a planned traveling route acquisition unit that acquires the planned traveling route of the vehicle. A display that displays on a display a lane information acquisition unit that acquires lane information indicating a direction for each lane of an approach road to an intersection, a map including a planned travel route, and a lane guide that indicates lane information about the plurality of intersections A display control unit that displays icons that can be distinguished from each other on a plurality of intersections in a map, and displays icons in the same manner as the icons in the map in association with each of the plurality of intersections in a lane guide To function as. In addition, when the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, the display control unit displays an icon corresponding to the nearest intersection on the map with priority over the planned travel route, and intersections other than the nearest intersection The computer realizes a function of preferentially displaying the planned travel route over the icon corresponding to.

  That is, in the navigation system and program, when the distance between the vehicle and the nearest intersection on the planned travel route is equal to or less than the predetermined distance, the icon corresponding to the nearest intersection is displayed with priority over the planned travel route. Icons corresponding to intersections other than the intersection are not displayed preferentially over the planned travel route. Therefore, at the stage where the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, it is easier for the driver to focus on the icon at the nearest intersection than at the intersection other than the nearest intersection. When the distance between the vehicle and the nearest intersection is less than the default distance, the lane information of the nearest intersection is driving rather than the lane information of intersections other than the nearest intersection (intersections after the nearest intersection). Is likely to be important to the Even if the distance between the vehicle and the nearest intersection is less than or equal to the default distance, not only the icon for the nearest intersection but also icons for intersections other than the nearest intersection are displayed on the map. It may be difficult to focus on the icon of the most recent intersection with high importance. According to the configuration of the present invention, the driver can easily focus on the icon displayed on the nearest intersection on the map when approaching the nearest intersection within a predetermined distance. As a result, the driver can easily find an icon having the same mode as the icon from the lane guide, and can easily understand the lane information about the nearest intersection. In addition, the driver can grasp the traveling direction at the nearest intersection by the planned travel route displayed on the map. Therefore, according to the configuration of the present invention, it is possible to increase the possibility that the driver can easily recognize the traveling direction of the vehicle at the nearest intersection on the planned travel route and the lane information of the intersection.

It is a block diagram which shows the structure of a navigation system. FIG. 2A is an explanatory diagram of a map and a lane guide, and FIG. 2B is a diagram illustrating a configuration example of a layer. 3A and 3B are diagrams showing display examples. It is a flowchart which shows a display control process. 5A and 5B are diagrams illustrating a configuration example of layers according to another embodiment.

Here, embodiments of the present invention will be described in the following order.
(1) Configuration of navigation system:
(2) Display control processing:
(3) Other embodiments:

(1) Configuration of navigation system:
FIG. 1 is a block diagram showing a configuration of a navigation system 10 according to an embodiment of the present invention. The navigation system 10 is provided in a vehicle, and includes a control unit 20 including a CPU, a RAM, a ROM, and the like, and a recording medium 30. The navigation system 10 can execute a program stored in the recording medium 30 or the ROM by the control unit 20. In the recording medium 30, map information 30a and drawing information 30b are recorded in advance.

  The map information 30a is information used to specify the position of the vehicle and the facility to be guided, and specifies node data indicating the position of the node set on the road on which the vehicle travels, and the shape of the road between the nodes. This includes shape interpolation point data indicating the position of the shape interpolation point, etc., link data indicating the connection between the nodes, data indicating the position of the road and its surrounding features, and the like.

  In the present embodiment, lane information indicating the lane configuration of the approach road to the intersection indicated by the node is recorded in association with each link data. For example, a certain link data indicates an approach road to a certain node, and there are three lanes on the approach road to the intersection indicated by the certain node. In each of the left lane, the center lane, and the right lane, go straight ahead. When left turn is possible, straight travel is possible, and right turn is possible, information indicating these is associated with link data as lane information. That is, lane information indicating the exit direction of each lane from the intersection at the end point of the link is recorded in association with the link data.

  The drawing information 30b includes information indicating shapes, colors, and the like of various objects (including icons and characters) displayed on the display of the user I / F unit 44 described later by the navigation system 10. Further, the drawing information 30b includes information indicating the configuration of the display layer described later.

  The vehicle in this embodiment includes a GNSS receiver 41, a vehicle speed sensor 42, a gyro sensor 43, and a user I / F unit 44. The GNSS receiver 41 is a device that receives a signal of the Global Navigation Satellite System, receives radio waves from a navigation satellite, and outputs a signal for calculating the current position of the vehicle via an interface (not shown). The control unit 20 acquires this signal and acquires the current position of the vehicle. The vehicle speed sensor 42 outputs a signal corresponding to the rotational speed of the wheels provided in the vehicle. The control unit 20 acquires this signal via an interface (not shown) and acquires the vehicle speed. The gyro sensor 43 detects angular acceleration about turning in the horizontal plane of the vehicle, and outputs a signal corresponding to the direction of the vehicle. The control unit 20 acquires this signal and acquires the traveling direction of the vehicle. The vehicle speed sensor 42, the gyro sensor 43, and the like are used for specifying the travel locus of the vehicle. In the present embodiment, the current position is specified based on the departure location and the travel locus of the vehicle, and the departure location and the travel location are determined. The current position of the vehicle specified based on the trajectory is corrected based on the output signal of the GNSS receiver 41.

  The user I / F unit 44 is an interface unit for inputting a driver's instruction and providing various information to the driver, and includes a touch panel display, a switch, a speaker, and the like (not shown). . That is, the user I / F unit 44 includes an image and audio output unit and a driver input unit.

  The control unit 20 receives the input of the destination by the driver via the input unit of the user I / F unit 44 by the function of the navigation program 21 and searches for a planned travel route from the current position of the vehicle to the destination. Further, the control unit 20 can perform route guidance for instructing a travel route to the driver of the vehicle by the function of the navigation program 21. For the route guidance, the control unit 20 can execute a function of displaying a map, a lane guide, and the like including the planned traveling route on the display of the user I / F unit 44.

  The navigation program 21 includes a planned travel route acquisition unit 21a, a lane information acquisition unit 21b, and a display control unit 21c in order to realize the above-described functions. The planned travel route acquisition unit 21a is a program module that causes the control unit 20 to realize the function of acquiring the planned travel route of the vehicle. That is, the control unit 20 receives an input of the destination by the driver via the input unit of the user I / F unit 44 by the function of the planned travel route acquisition unit 21a. Further, the control unit 20 acquires the current position of the vehicle based on the output signals of the GNSS receiving unit 41, the vehicle speed sensor 42, and the gyro sensor 43. Then, the control unit 20 refers to the map information 30a, searches for a route for traveling from the current position to the destination, and acquires it as a planned traveling route.

  The lane information acquisition unit 21b is a program module that causes the control unit 20 to realize a function of acquiring lane information indicating the exit direction of each lane from the intersection for each of a plurality of intersections ahead of the vehicle on the planned travel route. That is, the control unit 20 refers to the map information 30a by the function of the lane information acquisition unit 21b and corresponds to the link data corresponding to the road section on the planned travel route that enters the intersection existing ahead of the vehicle in the planned travel route. Get attached lane information.

  The display control unit 21c is a program module that causes the control unit 20 to realize a function of displaying a map including a planned travel route and a lane guide indicating lane information about a plurality of intersections on the display of the user I / F unit 44. is there. With the function of the display control unit 21c, the control unit 20 displays icons that can be distinguished from each other on a plurality of intersections in the map, and in the lane guide, corresponds to each of the plurality of intersections and has the same mode as the icon on the map. Is displayed.

FIG. 2A is a diagram for explaining a configuration example of the map M and the lane guide LG in the present embodiment. In order to make the drawing easier to see, an arrow A and the like to be described later are not shown in FIG. 2A. As shown in FIG. 2A, on the map M, the current position of the vehicle is indicated by a current position icon C. In the example of FIG. 2A, the map M includes two intersections (three-way intersections), and icons I ₁ and I ₂ that can be distinguished from each other are superimposed on each intersection. In the present embodiment, the icons at the respective intersections are identifiable by the difference in hatching inside the rhombus. In addition, the structure by which the icon of each intersection is displayed so that identification is mutually possible by making various display modes, such as a color and a shape of an icon, different may be sufficient.

  In the lane guide LG, the lane information of a plurality of intersections ahead of the vehicle on the planned travel route is displayed side by side in the planned order of passage. In the display area corresponding to each intersection in the lane guide LG, an icon for identifying the intersection, the name of the intersection (or the name of the intersecting road), and the planned travel route from the current position of the vehicle to the intersection Distance, and the lane information of the intersection. The icon of the intersection displayed in the display area of each intersection of the lane guide LG is the same icon as the icon displayed on the corresponding intersection in the map M. The driver can easily grasp where the intersection shown in the lane guide LG is an intersection located on the map M by this icon. In addition to the intersection displayed on the map M, the lane guide LG may display lane information about an intersection that is far from the current position of the vehicle and is not yet included in the display range of the map M.

  In the present embodiment, as shown in FIG. 3A, an arrow A (Maneuver arrow) indicating the traveling direction at the intersection is displayed at the intersection on the planned travel route. The arrow A in the present embodiment includes a shaft portion and a flange portion. The shaft portion is a linear portion having a shape along a road that is a planned travel route. In the present embodiment, the flange portion is a portion having an isosceles triangle shape whose base is in contact with one end of the shaft portion, and is drawn so that the vertex facing the base of the isosceles triangle is positioned at the end point of the arrow A. The length from the start point to the end point of the arrow A is predetermined (however, it may vary depending on the scale of the map, etc.), and the arrow A indicates the planned travel route with the target intersection included in the center in the length direction. Overlaid on top. That is, in this embodiment, the traveling direction at each intersection on the planned travel route is guided to the driver by the arrow A.

  In order to display the map M and the lane guide LG as described above during the guidance of the planned travel route, the control unit 20 uses the functions of the display control unit 21c to control the GNSS reception unit 41, the vehicle speed sensor 42, and the gyro sensor 43. The current position of the vehicle is acquired based on the output signal. Then, the control unit 20 draws a map M around the current position based on the current position and the map information 30a. Further, the control unit 20 draws a lane guide LG indicating lane information of an intersection ahead on the planned travel route from the current position of the vehicle on the map M.

  The map M and the lane guide LG are drawn on a plurality of virtually set layers. In the present embodiment, as shown in FIG. 2B, in order from the bottom, the first layer in which the background of the facility and the like is drawn, the second layer in which the road and the like are drawn, the arrow A indicating the traveling direction at the intersection, and the like are drawn A third layer to be drawn, a fourth layer in which an icon of an intersection on the planned travel route is drawn, a fifth layer in which a current position icon indicating the current position of the vehicle is drawn, a lane guide LG and an enlarged intersection V described later Is constituted by the sixth layer on which is drawn.

  In the first layer, the shape of the feature existing around the road is drawn, and the background colored according to the type of the feature is drawn. Based on the map information 30a and the drawing information 30b, the control unit 20 specifies the position, shape, color, and the like of the feature included in the display range of the map M, and draws the corresponding feature at each position. Draw one layer. Since the second layer is a layer for drawing a road, the control unit 20 specifies the position of the road based on the map information 30a, specifies the width of the road based on the type of the road, and the like. The second layer is drawn by drawing a road having the width.

  Since the third layer is a layer for drawing an arrow A indicating the traveling direction at the intersection on the planned travel route, the control unit 20 specifies the position of the intersection on the planned travel route based on the map information 30a, and plans the travel A point that is a certain distance away from the intersection in the route in the reverse direction is identified as the starting point of arrow A, and a point that is a certain distance away from the intersection in the forward direction in the planned travel route is identified as the end point of arrow A (tip of the buttock) To do. Then, the control unit 20 draws the third layer on the road that is the planned travel route from the start point to the end point by drawing an arrow A in which the shaft portion is a line having a predetermined width and the collar portion is an isosceles triangle. To do. In this embodiment, the control unit 20 draws an arrow A having a shaft portion having the same width as the width of the road corresponding to the planned travel route drawn in the second layer (the maximum width of the collar portion is greater than the width of the shaft portion). large). Note that when there is no intersection on the planned travel route within the display range of the map M, the control unit 20 does not draw an arrow on the third layer.

  Since the fourth layer is a layer for drawing an intersection icon, the control unit 20 is an intersection ahead of the current position of the vehicle on the planned travel route based on the map information 30a and included in the display range of the map M. And the icon for identifying the intersection is drawn on the intersection. Note that if there is no intersection on the planned travel route in the display range of the map M, the control unit 20 does not draw an intersection icon on the fourth layer. Since the fifth layer is a layer for drawing the current position icon, the control unit 20 draws the current position icon C at the current position of the vehicle based on the drawing information 30b.

  The sixth layer is a layer for drawing the lane guide LG (and the enlarged intersection V). The control unit 20 specifies an intersection to be displayed on the lane guide LG from among the intersections existing ahead of the current position of the vehicle on the planned travel route. For example, the control unit 20 specifies a maximum of three intersections in the order closer to the vehicle on the planned travel route. In addition, the control unit 20 acquires the name of each intersection (or the name of the intersecting road) displayed on the lane guide LG and the lane information of each intersection with reference to the map information 30a. Further, the control unit 20 calculates a distance on the planned travel route from the current position of the vehicle to each intersection based on the map information 30a. Moreover, the control part 20 specifies the icon of the intersection in the map M corresponding to the intersection displayed on the lane guide LG. Then, in the display area for each intersection of the lane guide LG, the control unit 20 identifies an intersection, the name of the intersection (or the name of the intersecting road), the distance to the intersection, and the lane information of the intersection. Draw. Note that the icons for identifying the intersections may be omitted from the intersections not included in the display range of the map M.

  The control unit 20 superimposes the drawing results for each layer at a predetermined timing. At this time, the control unit 20 performs superimposition by superimposing the drawing contents of the upper layer on the drawing contents of the lower layer. When the layer drawing content is superimposed, the control unit 20 displays the obtained superimposition result image on the display of the user I / F unit 44.

  Until the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance (while the distance between the vehicle and the nearest intersection is larger than the predetermined distance), the control unit 20 displays the map M and the lane guide LG as described above. Drawing on the RAM and displaying the drawn contents on the display. As a result, a screen as shown in FIG. 3A is displayed on the display. When the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, the control unit 20 uses the function of the display control unit 21c to select an arrow for an icon corresponding to the nearest intersection on the map M as shown in FIG. 3B. The icon A is displayed with priority over A, and the arrow A is preferentially displayed for icons corresponding to intersections other than the most recent intersection. Moreover, the control part 20 displays the intersection enlarged view V, when the distance of a vehicle and the nearest intersection becomes below a predetermined distance. In the intersection enlarged view V, for example, a 3D view of the intersection and a remaining distance to the intersection may be displayed.

  Therefore, the control part 20 changes the drawing process of a 4th layer as follows, when the distance of a vehicle and the nearest intersection becomes below a predetermined distance. That is, the control unit 20 draws an icon corresponding to the nearest intersection among the intersections existing in front of the vehicle on the planned travel route, and does not draw an icon corresponding to an intersection other than the nearest intersection. In addition, about the 1st-3rd layer and the 5th layer, the control part 20 performs the drawing process similar to the above. For the sixth layer, the control unit 20 executes the drawing process for the intersection enlarged view V in addition to the drawing process for the lane guide LG. The lane guide LG and the intersection enlarged view V are drawn at positions that do not overlap the current position icon C, the arrow A, and the like on the map M. When the control unit 20 superimposes the drawing results for each layer and displays them on the display, a screen as shown in FIG. 3B is displayed on the display. The intersection enlarged view V may be configured to be displayed on a display (for example, HUD or the like) different from the display on which the map M and the lane guide LG are displayed.

Arrow A in the example of FIGS. 3A and 3B are arrows indicating the direction of travel at the nearest intersection indicated by the icon I _1. Therefore, the starting point of the arrow A is a point of constant distance traveled from the last intersection planned travel route in the reverse direction indicated by the icon I _1, planned travel from the last intersection end point of the arrow A shown by the icon I ₁ It is a point of a certain distance along the route in the forward direction. However, in this example, since the next intersection (indicated by the icon I ₂ ) of the nearest intersection is located up to the end point of the arrow A, the icon I ₁ indicating the nearest intersection is indicated by the arrow A as shown in FIG. 3A. two icons I ₂ indicating the next intersection nearest intersection so that the displayed superimposed with.

  Until the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, the driver looks at the map M shown in FIG. 3A and confirms that there are two intersections at the position where the arrow A is displayed. It is possible to recognize the information about each intersection in the lane guide LG based on the correspondence between the intersection icons.

If the distance between the vehicle and the nearest intersection becomes the default distance less, as shown in FIG. 3B, the most recent icon I ₁ illustrating the intersection is displayed on the arrow A in the intersection other than the nearest intersection icon I _{Since 2} is not displayed on the arrow A, the driver tends to pay attention to the nearest intersection. At the stage where the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, it is more likely that the information about the nearest intersection is more important to the driver than the next intersection after the nearest intersection. Even if the distance between the vehicle and the nearest intersection is equal to or smaller than the predetermined distance, not only the nearest intersection icon I ₁ but also the next intersection icon I ₂ is displayed on the arrow A. , it may be difficult to focus on the icon I ₁ of high importance nearest intersection to the driver.

According to this embodiment, since the in the step of distance between the vehicle and the nearest intersection becomes the default distance or less, the driver tends to focus on the icon I ₁ of the nearest intersection in the map M, the same as the icon I ₁ It is easy to find the icon I ₁ of the aspect from the lane guide LG, and it is easy to grasp the lane information about the latest intersection. Further, the arrow A allows the driver to grasp the traveling direction at the nearest intersection. As a result, the driver can perform the driving operation necessary for the nearest intersection (for example, move to the right turn lane before entering the intersection and turn right at the intersection) for the next intersection after the nearest intersection. It can be recognized without being confused with the required driving operation. Therefore, according to the configuration of the present embodiment, it is possible to increase the possibility that the driver can easily recognize the traveling direction of the vehicle at the nearest intersection on the planned travel route and information on the intersection (lane information, etc.). it can.

(2) Display control processing:
Next, a display control process executed by the control unit 20 by the function of the display control unit 21c will be described with reference to FIG. The display control process is repeatedly executed by the control unit 20 at a predetermined timing. Prior to the execution of the display control process, the control unit 20 acquires the planned travel route and lane information corresponding to each intersection on the planned travel route by the functions of the planned travel route acquisition unit 21a and the lane information acquisition unit 21b. To do. When the display control process is started, the control unit 20 determines the display range of the map M (step S100). For example, the control unit 20 acquires the current position of the vehicle, and uses a predetermined range including the current position of the vehicle and the front, rear, left, and right of the vehicle as the display range of the map M.

  Subsequently, the control unit 20 determines whether or not an intersection on the planned travel route is included in the display range of the map M (step S105). That is, the control unit 20 acquires the position of the intersection on the planned travel route from the map information 30a, and determines whether or not the acquired position of the intersection is within the display range of the map M. If it is not determined in step S105 that the display range of the map M includes an intersection on the planned travel route, the control unit 20 draws the first, second, and fifth layers (step S125). That is, the control unit 20 draws a background corresponding to the display range of the map M on the first layer, draws a road included in the display range of the map M on the second layer, and draws a current position icon C on the fifth layer. To do.

  Subsequently, the control unit 20 draws the lane guide LG on the sixth layer (step S130). That is, the control unit 20 draws the lane guide LG including the lane information of the intersection existing ahead of the vehicle on the planned travel route on the sixth layer. Subsequently, the control unit 20 superimposes the drawing contents of each layer on the display of the user I / F unit 44 (step S135). That is, when the control unit 20 executes steps S100, S105 (N determination), S125, S130, and S135 in this order, the background is the first layer, the road is the second layer, the current position icon C is the fifth layer, the sixth layer The lane guide LG is drawn (see FIG. 2B), and the background, road, current position icon C, and lane guide LG are displayed on the display.

  When it is determined in step S105 that an intersection on the planned travel route is included in the display range of the map M, the control unit 20 determines whether or not the distance between the vehicle and the nearest intersection is equal to or less than a predetermined distance ( Step S110). That is, the control unit 20 acquires the current position of the vehicle. Subsequently, the control unit 20 acquires, as the nearest intersection, the intersection at the rearmost in the traveling direction among the intersections on the planned travel route included in the display range of the map M acquired in step S105. Then, the control unit 20 acquires a distance on the planned travel route from the current position of the vehicle to the nearest intersection, and determines whether or not the distance is equal to or less than a predetermined distance.

  If it is not determined in step S110 that the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, the control unit 20 draws an intersection icon regardless of whether or not it is closest to the fourth layer (step S115). That is, the control unit 20 draws different intersection icons at the intersection positions on the planned travel route included in the display range of the map M.

  When it is determined in step S110 that the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, the control unit 20 draws the nearest intersection icon on the fourth layer (step S140). That is, in the fourth layer, the control unit 20 draws an icon indicating the intersection at the position of the nearest intersection, and does not draw an intersection icon for other intersections. Subsequently, the control unit 20 draws the intersection enlarged view V on the sixth layer (step S145).

  After executing Step S115 or Step S145, the control unit 20 draws an arrow on the third layer (Step S120). That is, the control unit 20 draws an arrow indicating the traveling direction at the intersection on the planned travel route included in the display range of the map M at a position overlapping the intersection and the road section that is the planned travel route before and after the intersection. After executing Step S120, the control unit 20 executes the processing after Step S125 described above.

When the control unit 20 executes steps S100, S105 (Y determination), S110 (N determination), S115, S120, S125, S130, and S135 in this order, the background and the road are displayed on the display, and the intersection on the planned travel route An arrow A and an intersection icon are displayed on top of each other, and a current position icon C and a lane guide LG are displayed. Therefore, the position of the start point of the arrow indicating the traveling direction of the nearest intersection to the end, may also be included immediate next intersection, as shown in FIG. 3A, and icons I ₁ of the nearest intersection to the arrow A recent icon I ₂ of the next intersection is to be superimposed on the.

Further, when the control unit 20 executes in order of steps S100, S105 (Y determination), S110 (Y determination), S140, S145, S120, S125, S130, and S135, the background and road are displayed on the display, and the traveling schedule is planned. An arrow A is displayed over the intersection on the route, but only the icon corresponding to the nearest intersection is displayed as the intersection icon. Further, the current position icon C is displayed, and the lane guide LG and the intersection enlarged view V are displayed. Therefore, even when the next next intersection is also included in the position from the start point to the end point of the arrow indicating the traveling direction at the nearest intersection, as shown in FIG. 3B, the arrow A has the icon I of the nearest intersection. Only ₁ is superimposed and displayed.

(3) Other embodiments:
The above embodiment is an example for carrying out the present invention. When the distance between the vehicle and the nearest intersection on the planned travel route is equal to or less than the predetermined distance, the icon corresponding to the nearest intersection is traveled on the map. Various other embodiments can be employed as long as the scheduled travel route is displayed with priority over the icons corresponding to the intersections other than the nearest intersection, with priority displayed over the planned route. For example, the navigation system 10 may be a device mounted on a vehicle or the like, a device realized by a portable terminal, or realized by a plurality of devices (for example, a client and a server). It may be a device.

  Furthermore, at least a part of the planned travel route acquisition unit 21a, the lane information acquisition unit 21b, and the display control unit 21c constituting the navigation system 10 may be divided into a plurality of devices. For example, some of the functions of the planned travel route acquisition unit 21a and the lane information acquisition unit 21b may be realized by a server. Of course, a part of the configuration of the above-described embodiment may be omitted, and the processing order may be changed or omitted.

  The planned travel route acquisition unit only needs to acquire the planned travel route of the vehicle. For example, the search for the planned travel route may be performed in another terminal or server, and the planned travel route may be acquired from the other terminal or server by wireless communication. The lane information acquisition unit only needs to be able to acquire lane information indicating the exit direction of each lane from the intersection for each of a plurality of intersections ahead of the vehicle on the planned travel route. For example, the lane information may be obtained from a server.

  The display control unit has a function of displaying on a display a map including a planned travel route and a lane guide indicating lane information about a plurality of intersections ahead of the vehicle on the planned travel route. It is only necessary to display icons that can be distinguished from each other on the top, and to display icons in the same manner as the icons on the map in association with each of a plurality of intersections in the lane guide. Furthermore, when the distance between the vehicle and the nearest intersection is less than the predetermined distance, the display control unit displays the icon corresponding to the nearest intersection on the map with priority over the planned travel route, and other than the nearest intersection. It is only necessary that the planned travel route can be displayed with priority over the icon corresponding to the intersection.

  For example, in the above-described embodiment, as shown in FIGS. 3A and 3B, an arrow indicating the traveling direction at the intersection on the planned travel route is displayed at each intersection on the planned travel route regardless of the distance between the intersection and the vehicle. Although it is configured to be displayed, the arrow may be configured to be displayed in an arrow display period from when the distance between the vehicle and the nearest intersection becomes equal to or less than a predetermined distance until the vehicle passes the nearest intersection. .

In the case of this configuration, in the case other than the arrow display period, for example, as shown in FIG. 5A, the background is displayed on the first layer, the road is displayed on the second layer, and the intersection icon is displayed on the third layer. Intersection icons corresponding to all the intersections on the planned travel route included in the range), the current position icon on the sixth layer, and the lane guide on the seventh layer. As a result, for example, as shown in FIG. 2A, the arrow indicating the traveling direction at the intersection is not displayed for the nearest intersection or the intersection other than the nearest intersection, but the icons I ₁ , which can be distinguished from each other on each intersection. I ₂ is displayed. Further, in the display area of the intersection corresponding to the icon I ₁ lane guide LG, the distance with the intersection of the icon I ₁ is displayed to the lane information and the intersection name, intersection the intersection are displayed, the lane guide LG of in the display area of the intersection corresponding to the icon I _2, the distance to the lane information and the intersection name, intersection the intersection is displayed together with the intersection of the icon I ₂ is displayed.

In the arrow display period, for example, as shown in FIG. 5B, the same drawing process as in the case other than the arrow display period shown in FIG. 5A is performed for the first to third layers and the sixth layer. In the case of the arrow display period, as shown in FIG. 5B, an arrow indicating the direction of travel at the nearest intersection is further drawn on the fourth layer, the icon of the nearest intersection is drawn on the fifth layer, and the lane guide and the seventh layer are drawn. An enlarged view of the intersection is drawn. As a result, for example, as shown in FIG. 3B, when the next intersection of the nearest intersection is located at the position overlapping the arrow A, the intersection icon (I ₁ ) is displayed only at the nearest intersection, and the next intersection of the nearest intersection is displayed. The intersection icon (I ₂ ) is hidden behind the arrow A. Even in this configuration, when the distance between the vehicle and the nearest intersection is equal to or less than the predetermined distance, the information about the nearest intersection that is important for the driver is not easily confused with the information on other intersections. Can be recognized.

  In the above-described embodiment, the example in which the planned travel route is displayed by the arrow indicating the traveling direction at the nearest intersection has been described, but various other configurations may be employed. For example, a configuration may be adopted in which the planned travel route is displayed not only by the intersection and the road sections before and after the intersection but also by a line superimposed on the entire road that is the planned travel route. In addition, the width of the line indicating the planned travel route and the width of the shaft portion of the arrow may not necessarily be the same as the display width of the road that is the planned travel route (the width may be thicker or narrower than the display width of the road). Good). In the arrow, the intersection for indicating the traveling direction does not necessarily have to be located at the center in the length direction of the arrow (the length from the intersection to the start point may not match the length from the intersection to the end point). ).

  Moreover, the display control part should just display a driving plan route preferentially from the icon corresponding to intersections other than the nearest intersection, when the distance of a vehicle and the nearest intersection becomes below a predetermined distance. For example, in the above-described embodiment, it has been described that the icons of intersections other than the nearest intersection are completely hidden (not displayed) by the arrow indicating the planned travel route. However, the size of the intersection icon, the width of the arrow, Depending on the relationship with the shape or the like, it may be in a state where a portion that is not completely hidden and does not overlap with an arrow in the intersection icon can be visually recognized. Alternatively, the intersection icon and the arrow may be displayed so that the intersection is seen through thinly in a portion where the intersection icon and the arrow overlap.

  Further, as in the present invention, when the distance between the vehicle and the nearest intersection on the planned travel route is equal to or less than the predetermined distance, the icon corresponding to the most recent intersection is displayed with priority over the planned travel route on the map. The method of displaying the planned travel route with priority over the icons corresponding to the intersections other than the nearest intersection can also be applied as a program or method. In addition, the system, program, and method as described above may be realized as a single device, or may be realized by using parts shared with each part of the vehicle, and include various aspects. It is a waste. Further, some changes may be made as appropriate, such as a part of software and a part of hardware. Furthermore, the invention can be realized as a recording medium for a program for controlling the system. Of course, the recording medium of the program may be a magnetic recording medium, a semiconductor memory, or any recording medium to be developed in the future.

DESCRIPTION OF SYMBOLS 10 ... Navigation system, 20 ... Control part, 21 ... Navigation program, 21a ... Planned route acquisition part, 21b ... Lane information acquisition part, 21c ... Display control part, 21c ... Display control part, 30 ... Recording medium, 30a ... Map information, 30b ... Drawing information, 41 ... GNSS receiver, 42 ... Vehicle speed sensor, 43 ... Gyro sensor, 44 ... User I / F part, A ... Arrow, C ... Current position icon, I ₁ ... Icon (intersection icon) , I ₂ ... icon (intersection icon), LG ... lane guide

Claims (3)

A planned travel route acquisition unit for acquiring a planned travel route of the vehicle;
For each of a plurality of intersections ahead of the vehicle in the planned travel route, a lane information acquisition unit that acquires lane information indicating the exit direction from the intersection for each lane of the approach road to the intersection;
A display control unit for displaying on a display a map including the planned travel route and a lane guide indicating the lane information for a plurality of the intersections, and capable of identifying each other on the plurality of intersections in the map A display control unit that displays an icon indicating the icon in the same manner as the icon on the map in association with each of the plurality of intersections in the lane guide,
The display control unit
When the distance between the vehicle and the nearest intersection is equal to or less than a predetermined distance, the map displays the icon corresponding to the nearest intersection more preferentially than the planned travel route, and the other than the nearest intersection Display the planned route preferentially over the icon corresponding to the intersection,
Navigation system. In the map, the planned travel route is displayed with an arrow indicating a traveling direction at the nearest intersection.
The navigation system according to claim 1. Computer
A planned travel route acquisition unit for acquiring a planned travel route of the vehicle;
For each of a plurality of intersections ahead of the vehicle in the planned travel route, a lane information acquisition unit that acquires lane information indicating the exit direction from the intersection for each lane of the approach road to the intersection,
A display control unit for displaying on a display a map including the planned travel route and a lane guide indicating the lane information for a plurality of the intersections, and capable of identifying each other on the plurality of intersections in the map A navigation program that functions as a display control unit that displays an icon indicating the same icon as the icon on the map in association with each of the plurality of intersections in the lane guide,
The display control unit allows the computer to
When the distance between the vehicle and the nearest intersection is equal to or less than a predetermined distance, the map displays the icon corresponding to the nearest intersection more preferentially than the planned travel route, and the other than the nearest intersection Execute the function of displaying the planned travel route with priority over the icon corresponding to the intersection;
Navigation program.

Images